What Burlington County, NJ's soil rates for a septic system
Very limited
96.4% of Burlington County, NJ's surveyed soil comes back "Very limited" in USDA's own SSURGO data, the county's dominant condition for a septic absorption field. This is the reading that pushes a project toward an engineered system rather than a conventional one, and it covers 96.4% of Burlington County's land. Burlington County, NJ is 799.292 square miles with a population of 475,515.
What Burlington County's reading doesn't cover
USDA's survey covers the whole of Burlington County, NJ at once, not any single address. A local percolation test, typically $750-$1,850 (around $1,300 typical), is the only way to know what one lot in Burlington County will actually do.
What a system would cost here
With 96.4% of Burlington County rating "Very limited", a standard gravity system is not a safe assumption here. The engineered-system range, $10,000-$40,000 (mound or aerobic treatment), is the more realistic number to plan around, against $3,000-$8,000 for a conventional system on the rare lot that passes.
Where this sits nationally
Nationally, Burlington County, NJ is the 462-most-constrained of 3,058 rated counties for septic soil. Within New Jersey alone it ranks 1 of 21.
Before you act on this
How this rating is built, and its real limits · Conventional vs. engineered septic systems